Defines a function you can use to fetch an Oauth2 token from github for your application.
You should set the User-Agent you'd like to use in ./user-agent.js. Otherwise it defaults to: "nodejs/0.0.1 (node) gist command line tool"
See the github api docs for more info on these parameters
var auth_prep =scopes = "user" "gist" "repo"// currently the module exports a factory function which takes as parametersa few details about your applicationvar get_auth =